Permutation-lock.



Nl. PEDERSEN.

PERMUTATION LOCK.

APPLxcATloN r1LEn1uNE25.1914.

SHEET Patented Aug.

2 S H E ETS- Syvum/Ho@ Illu-lll www IVI. PEDERSEN.

PERNIUTATION LOCK.

APPLICATION FILED IUNE25, 1914.

Patented Aug. 31, 1915.

2 SHEETS-SHEET 2.

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NATI-IIS PEDERSEN, F MELROSE PARK, ILLINOIS.

PERMUTATION-LOCK.

Specification of Letters Patent.

iatented Aug. 31, 1915.

Application led J une 25, 1914. Serial No. 847,246.

10 all 'whom 'it may concern Be it known that I, Marins PEDERSEN, a citizen of the United States, residing at Melrose Park, in the county of Cook, State of Illinois, have invented certain new and useful Improvements in Permutation-Locks; and I do hereby declare the following to be a full, clear, and exact description ofthe 1nvention, such as will enable others skilled in the art to which it appertains to make and use the same.

rlhis invention relates to permutation locks and particularly to a type adapted for securing the lids of trunks, tool chests, boxes and the like against opening movement.

The object of the invention resides in the provision of a lock of the character named which will be impossible to set without a knowledge of the combination and which can be locked so as to prevent the operation thereof for the purpose of setting the combination.

A further object of the invention resides in the provision of a permutation lock which will be simple in construction, efficient 'in use, and which can be manufactured and installed at a very small cost.

With the above and other objects in view the invention consists in the details of construction and in the arrangement and combination of parts to be hereinafter more fully described and particularly pointed out in the appended claims.

In describing the invention in detail ref- -erence will be had to the accompanying drawings wherein like characters of reference denote corresponding parts in the sev eral views, and in which- Figure 1 is a plan view of a fragment of Ia chest embodying a hinged lid and having the improved lock associated therewith; Fig. 2, a section on the line 2-2 of Fig. 1 and showing the hinged lid locked; Fig. 3, a view similar to Fig. 2 with the combination of the lock set; Fig. 4, a view similar to Fig. 2 with the combination ofthe lock set and the latch element operated to release the lid for opening movement; Fig. 5, a fragment of what is shown in Fig.. l partly in -section and showing the combination dial -locked against movement; Fig. 6, a. view similar to F ig. 5 with certain portions in section to disclose the locking pin and its associated parts; Fig. 7, a section on the line -7-7 of Fig. 1 with the securing bolts ,ro-

tated to a position to permit extraction of the locking pin to effect unlocking of one of the tumbler shafts, and Fig. 8, a frag- `mental perspective view of the tumblers,

tumbler shafts and dial plates.

Referring to the drawings 10 indicates the front of a chest and 11 the hinged lid thereof. Mounted upon the inner side of the front 1() is a pivoted spring latch 12 which is adapted to coperate with a keeper 13 carried by the lid 11 to hold the latter against opening movement. The latch 12 has pivoted thereto an arm 14 which passes through an opening 15 in the front 10 and constitutes a gripping member whereby the latch may be operated for the purpose of disengaging same from the keeper as will be obvious. The operation of the latch to disengage same from the keeper is controlled by a locking device comprising a tubular shaft 16 rotatably mounted in the lid 11 and carrying at its upper end a dial plate 17 and at its lower end a tumbler 18 provided with a recess 19 in its periphery. rlhe dial plate 17 is provided centrally with a recess 2O in its upper side which is disposed concentric to the bore of the shaft 16. Rotatably mounted in the bore of the shaft 16 is a tubular shaft 16 the upper end of which terminates in a dial plate 17 seated in the recess 2O while the lower end thereof carries a tumbler 18 provided with a recess 19 in its periphery. The dial plate 17 is provided centrally with a recess 20 in its upper side which is disposed concentric to the bore of the shaft 16. Rotatably mounted in the bore of the shaft 16 is a shaft 21 the upper end of which terminates in a dial plate 22 seated in the recess 20 while the lower end thereof carries a tumbler 28 provided with a recess 24C in its periphery. From this construction it will be obvious that when the recesses 19, 19 and 24 are disposed out of registration the peripheries of the tumblers 18, 18 and 23 will be positioned to prevent operation of the latch 12 to disengage same from the keeper 13. On the other hand if the shafts 16, 16 and 21 are rotated so as to dispose the recesses 19, 19 and 211 in registration and directly at the rear of the latch 12 said latch can be readily operated to disengage same from the keeper to permit opening of the lid 11. The shaft 16 is disposed just at the rear of the keeper 13 as will be obvious.

To provide means for preventing rotation of the shaft 1G to dispose the recess 19 in proper position to effect operation of the latch 12 there is formed in the lid 11 a recess 25 which opens through the forward edge of the lid 11 and intersects at its inner end the opening in the lid 11 through which the shaft 1G extends. This shaft 16 is provided with transverse recesses 26 disposed oppositely and in the plane of the recess 25. Engaged in the recess 25 is a locking pin 27 having the end thereof adjacent the shaft 16 forked to form arms 28 which seat in the recesses 26 respectively, and thus lock the shaft 1G against rotation for the purpose of setting the tumbler 18 in combination. To prevent extraction of the locking pin 27 from the recess 25 said pin is provided in its side edges with oppositely disposed arcuate recesses 29. Rotatably mounted in the lid 11 on opposite sides of the pin 27 respectively are bolts 30 provided with cut away portions 31. Vhen the bolts 30 are rotated to dispose the cutaway portions 31 nearest the pin 27 it will be obvious that the pin 27 can be readily extracted. When the bolts 30 are in any other position they will project into respective recesses 29 and lock the pin 27 against extraction as will be obvious. It will of course be understood that suitable markings may be impressed on the head of the bolts 30 so that it may be easily determined when they are in proper position to permit extraction of the pin 27. Likewise suitable markings are impressed upon the dial plates 17 17 and 22 for the purpose of determining the set position of the tumblers 18 18 and 23.

Disposed upon the lid 11 is a coverl plate 32 provided with a continuous {iange 33 around its edge and which flange engages the top of the lid 11. The plate 32 is provided with a slot 34 having one end rounded as at 35. Rotatably mounted in the rounded end 35 is a bolt 36 having a dial head 37 and extending through an opening 38 in the lid 11. The shank of the bolt 36 is provided with opposite cutaway portions which when disposed in line with the slot 34 permit free movement of the bolt in the slot. When the cutaway portions 39 are disposed out of alinement with the slot 34 the bolt 36 is incapable of any movement relative to the plate 32 other than axial rotation. The plate 32 is normally held in position to dispose the bolt 36 in the rounded portion 35 of the slot 34 by a plurality of suitably mounted springs 40. The plate 32 in its normal Vposition covers a large portion of the dial plates 17, 17 and 22 and when the bolt 36 is set the plate 32 can be moved rearwardly to permit proper access to said dial plates for the purpose of operating the latter. The bolt 3G has mounted thereon a disk 41 provided with an arcuate recess 42 which recess in the set position of the bolt 36 is disposed to receive the dial plate 17 and permit free rotation of the latter. r1`he dial plate 17 is also provided with opposite arcuate recesses 43 which are adapted to interchangeably receive the disk 1, to secure the tumbler against rotation to operate the combination, or against rotation to destroy the combination.

`llfhat is claimed is 2 1. 1n a permutation lock, the combination i slii 'i during its disengaging movement, means for locking one of said tumblers against rotation to dispose the recess therein in position to receive the latch during disengaging movement thereof, and said tumblers acting as a stop to prevent disengaging movement of the latch when the recesses of the tumblers are disposed out of line.

2. 1n a permutation lock, the combination of a pair of elements to be locked, a latch carried by one of said elements, a keeper carried by the other element adapted to be engaged by the latch to secure the elements in locked relation, means for moving the latch to disengage same from the keeper,

a tubular shaft rotatably mounted in theelement carrying the keeper and provided with opposite transverse recesses in its outer face, a second tubular shaft rotatably mounted in the bore of the first named shaft, a third shaft rotatably mounted in the bore of the second tubular shaft, means for in dependently rotating said shafts, tumblers fixed on the inner ends of said shafts, respectively and having recesses in their peripheries adapted to be brought into line by rotation of the shafts and in position to receive the latch during its disengaging movement, said tumblers acting as a stop to prevent disengaging movement of the latch when the recesses' of the tumblers are disposed out of line, a locking pin detachably engaged in a recess in the element carrying the keeper and having one end thereof forked to form arms engageable in the recesses of the first named tubular shaft to lock same against rotation, and means for detachably securing the locking pin against removal from the recess in which it is mounted.

3. "in a permutation lock, the combination of a pair of elements tobe locked, a latch carried by one of said elements, a keeper carried by the other element adapted to be n locked relation, means for moving the tubular shaft for locking said shaft against 10 rotation.

In testimony whereof, I affix my signature, in the presence of two Witnesses.

MATHIS PEDERSEN.

engaged by the latch to secure the elements latch to disengage same from the keeper, a tubular shaft rotatably mounted in the element carrying the keeper, a tumbler Xed on the inner end of said shaft for controlling the disengaging movement of the latch, a dial fixed on the outer ends of said shaft, and means coperating With the dial on the Witnesses:

OSCAR C. SEHNERT, RICHARD COLEMAN.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

